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my Science experiment (Questions and Hypothosis (Daddy: wussy boy, Will:…
my Science experiment
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I could test
me running, still or jogging
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with breathing normally, in mask, in brocken mask
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Human beings must breathe oxygen . . . to survive, and begin to suffer adverse health effects when the oxygen level of their breathing air drops below [19.5 percent oxygen]. Below 19.5 percent oxygen . . . , air is considered oxygen-deficient.2 Apr 2007
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